http://zeptobars.ru/en/ Microelectronics. Die-shots. Artificial intelligence. Lasers. en-us Tue, 10 Jun 2006 04:00:00 GMT Sat, 05 Dec 15 17:51:10 +0300 [email protected] 120 10 <![CDATA[Infineon BFR740 - 42GHz BJT : weekend die-shot]]> http://zeptobars.ru/en/read/Infineon-BFR740-42GHz-BJT-npn Die size 305x265 µm.



After metal etch we can see that it's not that simple:


Main active area (scale 1px = 57nm):



]]> Tue, 10 Nov 15 08:18:27 +0300 <![CDATA[AD603 - 90 MHz Variable Gain Amplifier : weekend die-shot]]> http://zeptobars.ru/en/read/AD603-Variable-Gain-Amplifier-RF-VGA

]]> Mon, 26 Oct 15 10:35:02 +0300 <![CDATA[CHANGJIANG MMBT2222A - npn BJT transistor : weekend die-shot]]> http://zeptobars.ru/en/read/CHANGJIANG-MMBT2222A-npn-bjt-transistor OnSemi MMBT2222A CHANGJIANG MMBT2222A has both smaller die size and simpler layout (BC847-like) - which should cause significantly lower hFE on high collector currents.

Die size 234x234 µm.


]]> Mon, 26 Oct 15 10:26:07 +0300 <![CDATA[Linear LT1021-5 ±0.05% precision reference : weekend die-shot]]> http://zeptobars.ru/en/read/Linear-LT1021-precision-reference-zener Die size 2354x1364 µm.


]]> Mon, 19 Oct 15 11:05:10 +0300 <![CDATA[Phillips BC847C - npn BJT transistor : weekend die-shot]]> http://zeptobars.ru/en/read/Phillips-BC847C-npn-BJT-transistor

]]> Mon, 19 Oct 15 10:54:01 +0300 <![CDATA[ST UA741 - the opamp : weekend die-shot]]> http://zeptobars.ru/en/read/ST-UA741-opamp-operational-amplifier historic schematic of µA741 here.

Die size 1073x993 µm.


]]> Sun, 11 Oct 15 20:32:36 +0300 <![CDATA[Diodes BC847BS - matched BJT pair : weekend die-shot]]> http://zeptobars.ru/en/read/diodes-BC847BS-matched-pair-bjt-npn Die size 306x306 µm.



Second die:


Lithography repeatability is definitely better than this. Parameter matching is likely achieved by using adjacent dies from the wafer. 2 dies are used because one cannot place 2 BC847 transistors on the same die without significant changes to the technology (and it won't be BC847 anymore) - die bulk is transistor terminal.

Difference between the dies. Top metal is quite non-uniform optically (as usual) over the area, but this is unlikely to cause any electrical characteristics impact. Would be interesting to make similar difference photo for non-matched transistors.

]]> Sat, 26 Sep 15 16:22:39 +0300 <![CDATA[TL431 - adjustable shunt regulator : weekend die-shot]]> http://zeptobars.ru/en/read/TL431-adjustable-shunt-regulator-linear-supply another adjustable shunt regulator often used in linear supplies with external power transistor.
Die size 592x549 µm.


]]> Thu, 24 Sep 15 16:34:08 +0300 <![CDATA[S9018 - 0.8Ghz npn BJT : weekend die-shot]]> http://zeptobars.ru/en/read/S9018-npn-bjt

]]> Tue, 18 Aug 15 07:23:26 +0300 <![CDATA[LM319M : weekend die-shot]]> http://zeptobars.ru/en/read/LM319M-comparator Die size 2017x700 µm.


]]> Mon, 10 Aug 15 08:09:09 +0300